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WO2015054191A1 - Procédés et appareil pour une communication de liaison descendante améliorée - Google Patents

Procédés et appareil pour une communication de liaison descendante améliorée Download PDF

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Publication number
WO2015054191A1
WO2015054191A1 PCT/US2014/059414 US2014059414W WO2015054191A1 WO 2015054191 A1 WO2015054191 A1 WO 2015054191A1 US 2014059414 W US2014059414 W US 2014059414W WO 2015054191 A1 WO2015054191 A1 WO 2015054191A1
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WIPO (PCT)
Prior art keywords
downlink
tso
network entity
downlink enhancement
adjustment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
PCT/US2014/059414
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English (en)
Inventor
Tom Chin
Shouwen Lai
Kuo-Chun Lee
Wei Zhang
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Qualcomm Inc
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Qualcomm Inc
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Publication date
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Publication of WO2015054191A1 publication Critical patent/WO2015054191A1/fr
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0096—Indication of changes in allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic

Definitions

  • aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to enhanced downlink communication.
  • Wireless communication networks are widely deployed to provide various communication services such as telephony, video, data, messaging, broadcasts, and so on.
  • Such networks which are usually multiple access networks, support communications for multiple users by sharing the available network resources.
  • UTRAN Universal Terrestrial Radio Access Network
  • the UTRAN is the radio access network (RAN) defined as a part of the Universal Mobile Telecommunications System (UMTS), a third generation (3G) mobile phone technology supported by the 3rd Generation Partnership Project (3 GPP).
  • UMTS Universal Mobile Telecommunications System
  • 3 GPP 3rd Generation Partnership Project
  • the UMTS which is the successor to Global System for Mobile Communications (GSM) technologies, currently supports various air interface standards, such as Wideband-Code Division Multiple Access (W-CDMA), Time Division-Code Division Multiple Access (TD-CDMA), and Time Division- Synchronous Code Division Multiple Access (TD-SCDMA).
  • W-CDMA Wideband-Code Division Multiple Access
  • TD-CDMA Time Division-Code Division Multiple Access
  • TD-SCDMA Time Division- Synchronous Code Division Multiple Access
  • the UMTS also supports enhanced 3G data communications protocols, such as High Speed Downlink Packet Data (HSDPA), which provides higher data transfer speeds and capacity to associated UMTS networks.
  • HSDPA High Speed Downlink Packet Data
  • underutilization of available communication resources may often lead to degradations in wireless communication. Even more, the foregoing resource underutilization inhibits user equipments from achieving higher wireless communication quality through, for example, an increase in available bandwidth. Thus, improvements in downlink communication are desired.
  • a method of wireless communication at a user equipment comprises sending a downlink enhancement message to a network entity when a downlink enhancement condition has been detected. Further, the method comprises receiving communication from the network entity in response to sending the downlink enhancement message.
  • an apparatus for wireless communication at a UE comprises means for sending a downlink enhancement message to a network entity when a downlink enhancement condition has been detected. Further, the apparatus comprises means for receiving communication from the network entity in response to sending the downlink enhancement message.
  • an apparatus for wireless communication at a UE comprises a downlink enhancement component configured to send a downlink enhancement message to a network entity when a downlink enhancement condition has been detected. Further, the downlink enhancement component is further configured to receive communication from the network entity in response to sending the downlink enhancement message.
  • a method of wireless communication at a network entity comprises detecting a downlink enhancement condition. Further, the method comprises transmitting a network entity originated downlink enhancement message to a UE in response to detecting the downlink enhancement condition.
  • an apparatus for wireless communication at a network entity comprises means for detecting a downlink enhancement condition. Further, the apparatus comprises means for transmitting a network entity originated downlink enhancement message to a UE in response to detecting the downlink enhancement condition.
  • Additional aspects provide an apparatus for wireless communication at a network entity comprising a network entity downlink enhancement component configured to detect a downlink enhancement condition. Further, the network entity downlink enhancement component is further configured to transmit a network entity originated downlink enhancement message to a UE in response to detecting the downlink enhancement condition.
  • the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims.
  • the following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents.
  • FIG. 1 is a schematic diagram of a communication network including an aspect of a user equipment and a network entity that may enhance downlink communication;
  • FIG. 2 is a schematic diagram of an aspect of the communication component of
  • FIG. 3 is a schematic diagram of an aspect of the network entity communication component of Fig. 1;
  • Fig. 4a is a conceptual diagram of a downlink time slot arrangement
  • Fig. 4b is a conceptual diagram of a downlink time slot arrangement, according to Fig. 1;
  • FIG. 5 is a flowchart of an aspect of the downlink enhancement features at a user equipment, according to Fig. 1;
  • Fig. 6 is a flowchart of an aspect of the downlink enhancement features at a network entity, according to Fig. 1;
  • FIG. 7 is a block diagram conceptually illustrating an example of a wireless communication system including an aspect of the user equipment and network entity described herein;
  • FIG. 8 is a block diagram conceptually illustrating an example of a frame structure in a wireless communication system including an aspect of the user equipment and network entity described herein;
  • Fig. 9 is a block diagram conceptually illustrating an example of the network entity of Fig. 1, in communication with the user equipment of Fig. 1, in a wireless communication system.
  • the present aspects generally relate to enhancements in downlink wireless communication.
  • particular channels e.g., P-CCPCH
  • P-CCPCH may be designated with certain predefined communication characteristics.
  • time slot zero TSO
  • P-CCPCH Primary Common Control Physical Channel information
  • P-CCPCH may be utilized to communicate system information and/or measure one or more signal characteristics such as receive signal code power (RSCP).
  • RSCP receive signal code power
  • TSO may normally be employed to obtain inter/intra frequency measurements at every occurrence within a sub frame.
  • a user equipment may obtain inter/intra frequency measurements at every TSO occurrence to facilitate, for example, cell reselection and/or handover.
  • TSO measurements at every occurrence in a subframe may be deemed excessive.
  • an adjustment of TSO measurement frequency may be made to enhance downlink communication on one or more downlink communication channels.
  • the present methods and apparatuses may provide an efficient solution, as compared to current solutions, to efficiently utilize TSO for downlink data communication.
  • a wireless communication system 10 includes at least one UE 12 in communication coverage of at least one network entity 14 (e.g., base station).
  • UE 12 may communicate with network 16 by way of, for instance, network entity 14.
  • UE 12 may communicate with network entity 14 via one or more communication channels 18 utilizing one or more air interfaces (e.g., TD-SCDMA).
  • the one or more communication channels 18 may enable communication on both the uplink and downlink. For example, communication may be received by the UE 12 from the network entity 14 on the downlink communication channel of communication channel 18.
  • data communicated on the downlink may be utilize one or more of a downlink dedicated physical channel (DL-DPCH), a high-speed downlink packet access (HSDPA) and a high-speed-physical downlink shared channel (HS-PDSCH) to communicate data on one or more time slots including, but not limited to, TSO.
  • DL-DPCH downlink dedicated physical channel
  • HSDPA high-speed downlink packet access
  • HS-PDSCH high-speed-physical downlink shared channel
  • Time slots 20 may include one or more frames (e.g., TD-SCDMA frame) each including one or more subframes for communicating measurement and/or data along one or more communication channels (e.g., communication channel 18).
  • UE 12 may also be referred to by those skilled in the art as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, or some other suitable terminology.
  • network entity 14 may be a macrocell, picocell, femtocell, relay, Node B, mobile Node B, UE (e.g., communicating in peer-to-peer or ad-hoc mode with UE 12), or substantially any type of component that can communicate with UE 12 to provide wireless network access at the UE 12.
  • UE 12 may include communication component 22, which may be configured to facilitate wireless communication with at least one network entity (e.g., network entity 14).
  • communication component 22 may enable UE 12 to communicate with network entity 14 on one or more downlink data communication channels (e.g., DPCH, HSDPA & HS-PDSCH). Further, communication on the one or more downlink communication channels may be conducted using time slots (e.g., time division multiplexing).
  • communication component 22 may include downlink enhancement component 24, which may be configured to enhance downlink communication between UE 12 and network entity 14 by adjusting the frequency of TSO measurements occurring per frame.
  • downlink enhancement component 24 may be configured to increase the bandwidth allocated for downlink data communication by decreasing the TSO measurement periodicity.
  • downlink enhancement component 24 may adjust communication parameters such that downlink communication on TSO includes data transmission on one or more downlink data communication channels.
  • downlink enhancement component 24 may include downlink enhancement detection component 26, which may be configured to detect a downlink enhancement condition.
  • downlink enhancement condition may indicate satisfaction of one or more UE measurement comparisons (e.g., signal strength and/or velocity), and as such, trigger the transmission of a downlink enhancement message 28 to network entity (e.g., network entity 14).
  • network entity e.g., network entity 14
  • downlink enhancement detection component 26 may determine or otherwise detect a downlink enhancement condition that may indicate to one or both of downlink enhancement component 24 and communication component 22 to communicate downlink enhancement message 28 to network entity 14 for subsequent downlink enhancement determinations.
  • downlink enhancement detection component 26 may compare one or more UE measurements so as to determine the downlink enhancement condition, which may represent a suitable communication state (e.g., strong signal strength) to permit or otherwise trigger an enhancement of downlink communication. Further aspects of downlink enhancement component 24 are described herein with respect to Fig. 2.
  • network entity 14 may include network entity communication component 30, which may be configured to facilitate wireless communication with at one or more UEs (e.g., UE 12).
  • network entity communication component 30 may enable network entity 14 to communicate with UE 12 on one or more downlink data communication channels (e.g., DPCH, HSDPA & HS-PDSCH). Further, communication on the one or more downlink communication channels may be conducted using time slots (e.g., time division multiplexing).
  • network entity communication component 30 may include network entity downlink enhancement component 32, which may be configured to proactively enhance downlink communication between network entity 14 and UE 12 by adjusting the frequency of TSO measurements occurring per frame. For example, network entity 14 may instruct or otherwise indicate to UE 12 to adjust inter/intra frequency measurements conducted at or by UE 12.
  • network entity downlink enhancement component 32 may be configured to increase the bandwidth allocated for downlink data communication by decreasing the TSO measurement periodicity.
  • network entity downlink enhancement component 32 may adjust communication parameters such that downlink communication on TSO includes data transmission on one or more downlink data communication channels.
  • network entity downlink enhancement component 32 may include network entity downlink enhancement detection component 34, which may be configured to detect a downlink enhancement condition.
  • downlink enhancement condition may indicate satisfaction of one or more measurement comparisons at the network entity 14 (e.g., UE signal strength and/or UE velocity), and as such, trigger the transmission of a network entity downlink enhancement message 36 to one or more UEs (e.g., UE 12).
  • network entity downlink enhancement detection component 34 may determine or otherwise detect a downlink enhancement condition that may indicate to one or both of network entity downlink enhancement component 32 and network entity communication component 30 to communicate a downlink enhancement message 36 to UE 12 for subsequent downlink enhancement determinations.
  • network entity downlink enhancement detection component 34 may compare one or more UE measurements so as to determine the downlink enhancement condition, which may represent a suitable communication state (e.g., strong signal strength) to permit or otherwise trigger an enhancement of downlink communication. Further aspects of network entity downlink enhancement component 32 are described herein with respect to Fig. 3.
  • a suitable communication state e.g., strong signal strength
  • UE 12 may include various components and/or subcomponents, which may be configured to enhance downlink communication with a network entity (e.g., network entity 14, Fig. 1) by adjusting the frequency of TSO measurements occurring per frame.
  • downlink enhancement component 24 may be configured to send a downlink enhancement message 28 to a network entity (e.g., network entity 14, Fig. 1) when a downlink enhancement condition 66 has been detected, and to receive communication (e.g., TS bitmap message 76) from the network entity in response to sending the downlink enhancement message 28.
  • downlink enhancement component 24 may include downlink enhancement detection component 26, which may be configured to detect or otherwise determine a downlink enhancement condition 66.
  • downlink enhancement detection component 26 may include measurements component 40, which may be configured to determine and store one or more measurements made by one or more components of a UE (e.g., UE 12, Fig. 1). In some aspects, measurements component 40 may determine and store measurements related to the velocity value 42 of a UE (e.g., UE 12, Fig. 1). For example, a UE may include an accelerometer, global positioning system device, and/or any other electronic component configured to determine UE velocity. Further, measurements component 40 may determine and store the received signal code power (RSCP) 44. For example, measurements component 40 may be configured to determine the received power on the P-CCPCH. In addition, measurements component 40 may be configured to determine and store the signal-to-noise (SNR) ratio 46.
  • RSCP received signal code power
  • measurements component 40 may be configured to determine the received power on the P-CCPCH.
  • SNR signal-to-noise
  • measurements component 40 may be configured to determine the SNR 46 experienced at UE 12 (Fig. 1). Moreover, measurements component 40 may be configured to determine and store the received signal strength indicator (RSSI) 48. For instance, measurements component 40 may determine the total received power observed by a UE (e.g., UE 12, Fig. 1) from all sources, including co-channel serving and non-serving cells, adjacent channel interference and thermal noise within the measurement bandwidth. Furthermore, measurements component 40 may be configured to determine and store one or more additional measurements related to a UE signal strength 50. For example, UE 12 (Fig. 1) may determine a detected signal strength of one or more network entities (e.g., including network entity 14) based on a unit of measurement.
  • network entities e.g., including network entity 14
  • downlink enhancement detection component 40 may include comparator 52, which may be configured to compare one or more measurements received or otherwise obtained from the measurements component 40 with one or more corresponding measurement thresholds 54.
  • Comparator 52 may determine and/or store thresholds in measurement threshold component 54, including, but not limited to, a UE velocity threshold value 56 corresponding to the measured UE velocity value 42, an RSCP threshold value corresponding to the measured RSCP value 44, an SNR threshold value 60 corresponding to a measured SNR value 46, an RSSI threshold value 62 corresponding to a measured RSSI value 48 and a signal strength threshold value 64 corresponding to a measured signal strength value 50.
  • comparator 52 may be configured to determine whether a measured signal strength value 50 meets or exceeds a signal strength threshold value 64. Further, for instance, comparator 52 may be configured to determine whether the UE velocity 42 is below a UE velocity threshold value 56. Moreover, when comparator 52 determines that at least one threshold condition is met, comparator 52 signals or otherwise provides a downlink enhancement condition 66 so as to trigger the transmission of downlink enhancement message 28. In other words, downlink enhancement detection component 26 through the operation of comparator 52 and generation of downlink enhancement condition 66 may determine the adequate condition or conditions for adjusting TS0 measurement periodicity.
  • downlink enhancement component 24 may be configured, upon detection of downlink enhancement condition 66, to send a downlink enhancement message 28 to a network entity (e.g., network entity 14, Fig. 1).
  • a network entity e.g., network entity 14, Fig. 1
  • the downlink enhancement message 28 may be transmitted to the network entity 14 (Fig. 1) within or via a radio resource (RRC) measurement report message 74.
  • RRC radio resource
  • downlink enhancement message 28 may include a TS0 measurement periodicity adjustment indication 68, which may, among other aspects, indicate to the network entity, a request for an adjusted measurement periodicity 70 and a defined time duration 72 for such adjustment. That is, in some aspects, the TS0 measurement periodicity adjustment indication 68 may request network authorization (e.g., from network entity 14, Fig.
  • the defined time duration 72 may be specified in any unit of time (e.g., seconds, milliseconds) and/or may be specified by a number of frames and/or subframes. Further, the defined time duration 72 may be based on one or both of communication measurements and UE velocity (e.g., provided or determined by downlink enhancement detection component 26).
  • the defined time duration 72 may be higher (e.g., 10 frames or 50 ms) as opposed to when the velocity value 42 is slightly lower than the velocity threshold value 56 (e.g., 5 frames or 25 ms). The same or similar may be the case for any UE measurement described herein to determine the defined time duration.
  • the TSO measurement periodicity adjustment indication 68 permits downlink allocation on at least one TSO for the defined time duration 72.
  • downlink enhancement component 24 may transmit downlink enhancement message 28 including TSO measurement periodicity adjustment indication 68 to network entity 14 requesting an adjusted TSO measurement periodicity 70 (e.g., one TSO measurement per frame) for a defined time duration 72 (e.g., five frames or 50 ms).
  • TSO measurement periodicity 70 e.g., one TSO measurement per frame
  • a defined time duration 72 e.g., five frames or 50 ms.
  • Additional aspects of the downlink enhancement component 24 may include time slot (TS) bitmap message 76, which may be received subsequent to communication of downlink enhancement message 28 requesting network authorization of a TSO measurement periodicity adjustment.
  • TS time slot
  • network entity e.g., network entity 14
  • Downlink enhancement component 24 may obtain or otherwise receive TS bitmap message 76.
  • TS bitmap message 76 may optionally include TSO measurement periodicity adjustment authorization indication 78 authorizing downlink enhancement component 24 to adjust the TSO measurement periodicity to the received adjusted measurement periodicity 80 for the indicated defined time duration 82 (e.g., defined time value may be designated in milliseconds or number of frames/sub frames).
  • the received adjusted measurement periodicity 80 and the defined time duration 82 may be the same as or different from the adjusted measurement periodicity 70 and defined time duration 72 included in the downlink enhancement message 28.
  • the network entity 14 may determine a different adjusted measurement periodicity 80 than the adjusted measurement periodicity 70 provided by the UE and/or a different defined time duration 82, as compared to the defined time duration 72, for the adjustment.
  • the existence or absence of the TSO measurement periodicity adjustment authorization indication 78 in the TS bitmap message 76 may indicate whether or not the downlink enhancement component 24 is authorized to adjust the TSO measurement periodicity and/or the defined time duration. That is, the existence or absence of TSO measurement periodicity adjustment authorization indication 78 may permit or not permit, respectively, an adjustment of a frequency of TSO measurements per frame (e.g., adjusted measurement periodicity 70 or 80) for a defined time duration 72 or 82.
  • the TS bitmap message 76 may include a TSO measurement periodicity authorization indication 78 when permitting an adjustment of the frequency of TSO measurement per frame for the defined time duration.
  • the TS bitmap message 76 may include an absence of a TSO measurement periodicity adjustment authorization indication 78 when not permitting an adjustment of the frequency of TSO measurement per frame for the defined time duration.
  • TSO measurement periodicity adjustment component 84 may be configured to adjust TSO measurement periodicity for a defined time duration based on the received TSO measurement periodicity adjustment authorization indication 78 and included parameters (e.g., adjusted measurement periodicity 80 and defined time duration 82). For example, upon receiving TS bitmap message 76 including TSO measurement periodicity adjustment authorization indication 78, TSO measurement periodicity adjustment component 84 may extract and adjust the TSO measurement periodicity based on the adjusted measurement periodicity 80 for the defined time duration 82.
  • an aspect of the network entity downlink enhancement component 32 may include various components and/or subcomponents, which may be configured to enhance downlink communication with a UE (e.g., UE 12, Fig. 1) by transmitting a message authorizing adjustment of the frequency of TSO measurements occurring per frame. Further, for example, network entity downlink enhancement component 32 may be configured to detect a downlink enhancement condition 104, and transmit a downlink enhancement message to a UE in response to detecting the downlink enhancement condition 104.
  • network entity downlink enhancement component 32 may include network entity downlink enhancement detection component 34, which may be configured to detect or otherwise determine a downlink enhancement condition 104.
  • network entity downlink enhancement detection component 34 may include network entity measurements component 90, which may be configured to determine and store one or more measurements made by one or more components of a UE (e.g., UE 12, Fig. 1) or network entity (e.g., network entity 14, Fig. 1).
  • network entity measurements component 90 may determine and store measurements related to a modulation and coding scheme (MCS) value 100.
  • MCS modulation and coding scheme
  • the MCS value may be derived from or associated with the high speed shared control channel (HS-SCCH) data rate.
  • HS-SCCH high speed shared control channel
  • the determined MCS value 100 may indicate the information data rate of a transmission on the downlink.
  • measurements component 40 may determine and store the received signal code power (RSCP) 44.
  • RSCP received signal code power
  • network entity measurements component 90 may be configured to determine the received power on the P-CCPCH.
  • network entity measurements component 90 may be configured to determine and store the signal-to-noise (SNR) ratio 46.
  • SNR signal-to-noise
  • network entity measurements component 90 may be configured to determine the SNR 46 experienced at UE 12 (Fig. 1). Moreover, network entity measurements component 90 may be configured to determine and store the received signal strength indicator (RSSI) 48. For instance, network entity measurements component 90 may determine the total received power observed by a UE (e.g., UE 12, Fig. 1) from all sources, including co-channel serving and non-serving cells, adjacent channel interference and thermal noise within the measurement bandwidth. Furthermore, network entity measurements component 90 may be configured to determine and store one or more additional measurements related to a UE signal strength 50. For example, network entity 14 (Fig. 1) may receive indication of or otherwise determine a detected signal strength of one or more UEs (e.g., including UE 12) based on a unit of measurement.
  • RSSI received signal strength indicator
  • network entity downlink enhancement detection component 34 may include comparator 96, which may be configured to compare one or more measurements received or otherwise obtained from the network entity measurements component 90 with one or more corresponding measurement thresholds.
  • Comparator 96 may determine and/or store thresholds in measurement threshold component 98, including, but not limited to, an MCS threshold value 100 corresponding to the determined MCS value 92, a data rate threshold value 94 corresponding to a determined data rate value 94, an RSCP threshold value corresponding to the measured RSCP value 44, an SNR threshold value 60 corresponding to a measured SNR value 46, an RSSI threshold value 62 corresponding to a measured RSSI value 48 and a signal strength threshold value 64 corresponding to a measured signal strength value 50.
  • a UE downlink data rate e.g., data rate value 94
  • network entity downlink enhancement component 32 may be configured to optionally receive a downlink enhancement message 28, as described herein, from a UE (e.g., UE 12, Fig. 1).
  • network entity downlink enhancement component 32 may receive and provide downlink enhancement message 28 to downlink enhancement authorization component 106, which may be configured to determine whether to authorize the TS0 measurement periodicity adjustment request included or formed as part of the TS0 measurement periodicity adjustment indication 68.
  • downlink enhancement authorization component 106 may, upon receiving downlink enhancement message 287, determine whether the request to adjust the TS0 measurement periodicity may be supported by the network entity (e.g., network entity 14).
  • downlink enhancement authorization 106 may determine whether the UE is authorized or permitted to communicate with the network entity at higher data rates (e.g., HSDPA). In such aspects, for instance, downlink enhancement authorization 106 may determine whether to authorize an increase in the data rate by permitting allocation of at least one additional timeslot for downlink data communication.
  • network entity downlink enhancement component 32 may be configured, upon detection of downlink enhancement condition 104 or upon authorization indication from downlink enhancement message authorization component 106, to send a network entity originated downlink enhancement message (e.g., TS bitmap message 76) to a UE (e.g., UE 12, Fig. 1).
  • a network entity originated downlink enhancement message e.g., TS bitmap message 76
  • TS bitmap message 76 may optionally include TS0 measurement periodicity adjustment authorization indication 78 authorizing downlink enhancement component 24 to adjust the TS0 measurement periodicity to the received adjusted measurement periodicity 80 for the indicated defined time duration 82.
  • the received adjusted measurement periodicity 80 and the defined time duration 82 may be the same as or different from the adjusted measurement periodicity 70 and defined time duration 72 included in the downlink enhancement message 28.
  • the network entity may determine a different adjusted measurement periodicity 80 than the adjusted measurement periodicity 70 provided by the UE and/or a different defined time duration 82, as compared to the defined time duration 72, for the adjustment.
  • the existence or absence of the TS0 measurement periodicity adjustment authorization indication 78 in the TS bitmap message 76 may indicate whether or not the downlink enhancement component 24 is authorized to adjust the TS0 measurement periodicity and/or the defined time duration. That is, the existence or absence of TS0 measurement periodicity adjustment authorization indication 78 may permit or not permit, respectively, an adjustment of a frequency of TS0 measurements per frame (e.g., adjusted measurement periodicity 70 or 80) for a defined time duration 72 or 82.
  • the TS bitmap message 76 may include a TS0 measurement periodicity authorization indication 78 when permitting an adjustment of the frequency of TS0 measurement per frame for the defined time duration.
  • the TS bitmap message 76 may include an absence of a TS0 measurement periodicity adjustment authorization indication 78 when not permitting an adjustment of the frequency of TS0 measurement per frame for the defined time duration.
  • every frame includes two subframes each having time slots TS0 to TS6.
  • TS0 may be designated for inter/intra frequency measurements.
  • TS1 to TS3 may be designated for uplink data communication
  • TS4 to TS6 may be designated for downlink data communication.
  • Every frame may, for instance, include two measuring TS 110 (e.g., two TSO measurements). Accordingly, only six time slots are reserved for downlink communication, identified as DL RX TS 112.
  • every frame again includes at least two subframes each having time slots TSO to TS6.
  • only one TSO measurement may be designated for measurements per frame.
  • an adjustment of TSO periodicity measurements may be made to allocate only one TSO for measurements, and the other for downlink data communication for a define time duration (e.g., 10 frames or 50 ms).
  • every frame may, for example, include one measuring TS 114.
  • DL RX TS may now include seven time slots reserved for downlink communication (e.g., four DL RX TS for every other subframe in HSDPA).
  • a UE such as UE 12 (Fig. 1) may perform one aspect of a method 130 for enhancing downlink communication. While, for purposes of simplicity of explanation, the methods herein are shown and described as a series of acts, it is to be understood and appreciated that the methods are not limited by the order of acts, as some acts may, in accordance with one or more aspects, occur in different orders and/or concurrently with other acts from that shown and described herein. For example, it is to be appreciated that the methods could alternatively be represented as a series of interrelated states or events, such as in a state diagram. Moreover, not all illustrated acts may be required to implement a method in accordance with one or more features described herein.
  • method 130 may optionally include detecting a downlink enhancement condition.
  • downlink enhancement component 24 (Figs. 1 and 2) may execute downlink enhancement detection component 26 to detect downlink enhancement condition 66.
  • the downlink enhancement condition may include determining whether a measured signal strength value (e.g., signal strength 50, Fig. 2) meets or exceeds a signal strength threshold value (e.g., signal strength threshold value 64, Fig. 2). Further, for example, the measured signal strength value may be indicative of a RSCP.
  • detecting the downlink enhancement condition may include determining whether a UE velocity value (e.g., velocity value 42, Fig. 2) is below UE velocity threshold value (e.g., velocity threshold value 56, Fig. 2).
  • method 130 may include sending a downlink enhancement message to a network entity when a downlink enhancement condition has been detected.
  • communication component 22 (Fig. 1) may execute downlink enhancement component 24 to send the downlink enhancement message 28 to the network entity (e.g., network entity 14, Fig. 1) when the downlink enhancement condition has been detected.
  • the downlink enhancement condition may include a TS0 measurement periodicity adjustment indication.
  • the TS0 measurement periodicity adjustment indication requests network authorization of an adjustment of a frequency of TS0 measurements per frame for a defined time duration.
  • method 130 may include receiving communication from the network entity in response to sending the downlink enhancement message.
  • communication component 22 may execute downlink enhancement component 24 (Figs. 1 and 2) to receive communication from the network entity (e.g., network entity 14, Fig. 1) in response to sending the downlink enhancement message 28.
  • receiving communication from the network entity may include a TS bitmap message permitting or not permitting an adjustment of a frequency of TS0 measurements per frame for a defined time duration.
  • a network entity such as network entity 14
  • method 140 may perform one aspect of method 140 to enhance downlink communication.
  • method 140 may optionally include receiving a downlink enhancement message from a UE.
  • network entity communication component 30 may execute network entity downlink enhancement component 32 to receive the downlink enhancement message (e.g., measurement report message 74) from the UE (e.g., UE 12, Fig. 1).
  • the downlink enhancement message e.g., measurement report message 74
  • method 140 may include detecting a downlink enhancement condition.
  • network entity downlink enhancement component 32 (Figs. 1 and 3) may execute network entity downlink enhancement detection component 34 to detect a downlink enhancement condition 104.
  • detecting the downlink enhancement condition may include receiving the downlink enhancement message from the UE (block 142).
  • method 140 may include transmitting a network entity originated downlink enhancement message to a UE in response to detecting the downlink enhancement condition.
  • network entity communication component 30 may execute network entity downlink enhancement component 32 to send network originated downlink enhancement message (e.g., TS bitmap message 76, Fig. 3) to the UE (e.g., UE 12, Fig. 1) in response to detecting the downlink enhancement condition 104.
  • network originated downlink enhancement message e.g., TS bitmap message 76, Fig. 3
  • FIG. 7 a block diagram is shown illustrating an example of a telecommunications system 200 in which UE 12 and network entity 14 discussed herein, and/or their corresponding communication component 22 and network entity communication component 30, may operate, such as in the form of or as a part of UEs 210 and Node Bs 208.
  • the various concepts presented throughout this disclosure may be implemented across a broad variety of telecommunication systems, network architectures, and communication standards.
  • the aspects of the present disclosure illustrated in Fig. 7 are presented with reference to a UMTS system employing a TD-SCDMA standard.
  • the UMTS system includes a (radio access network) RAN 202 (e.g., UTRAN) that provides various wireless services including telephony, video, data, messaging, broadcasts, and/or other services.
  • the RAN 202 may be divided into a number of Radio Network Subsystems (RNSs) such as an RNS 207, each controlled by a Radio Network Controller (RNC) such as an RNC 206.
  • RNC Radio Network Controller
  • the RNC 206 is an apparatus responsible for, among other things, assigning, reconfiguring and releasing radio resources within the RNS 207.
  • the RNC 206 may be interconnected to other RNCs (not shown) in the RAN 202 through various types of interfaces such as a direct physical connection, a virtual network, or the like, using any suitable transport network.
  • the geographic region covered by the RNS 207 may be divided into a number of cells, with a radio transceiver apparatus serving each cell.
  • a radio transceiver apparatus is commonly referred to as a Node B in UMTS applications, but may also be referred to by those skilled in the art as a base station (BS), a base transceiver station (BTS), a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), an access point (AP), or some other suitable terminology.
  • BS basic service set
  • ESS extended service set
  • AP access point
  • two Node Bs 208 are shown, each of which may include communication component 30 of network entity 14 (Fig. 1); however, the RNS 207 may include any number of wireless Node Bs.
  • the Node Bs 208 provide wireless access points to a core network 204 for any number of mobile apparatuses.
  • a mobile apparatus include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a notebook, a netbook, a smartbook, a personal digital assistant (PDA), a satellite radio, a global positioning system (GPS) device, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, or any other similar functioning device.
  • SIP session initiation protocol
  • PDA personal digital assistant
  • GPS global positioning system
  • multimedia device e.g., a digital audio player (e.g., MP3 player), a camera, a game console, or any other similar functioning device.
  • MP3 player digital audio player
  • the mobile apparatus is commonly referred to as user equipment (UE) in UMTS applications, but may also be referred to by those skilled in the art as a mobile station (MS), a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal (AT), a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, or some other suitable terminology.
  • UE user equipment
  • MS mobile station
  • AT access terminal
  • three UEs 210 are shown in communication with the Node Bs 208, each of which may include communication component 22 of UE 12 (Fig. 1).
  • the downlink (DL), also called the forward link refers to the communication link from a Node B to a UE
  • the uplink (UL) also called the reverse link, refers to the communication link from a UE
  • the core network 204 includes a GSM core network.
  • GSM Global System for Mobile communications
  • the core network 204 supports circuit-switched services with a mobile switching center (MSC) 212 and a gateway MSC (GMSC) 214.
  • MSC mobile switching center
  • GMSC gateway MSC
  • the MSC 212 is an apparatus that controls call setup, call routing, and UE mobility functions.
  • the MSC 212 also includes a visitor location register (VLR) (not shown) that contains subscriber-related information for the duration that a UE is in the coverage area of the MSC 212.
  • VLR visitor location register
  • the GMSC 214 provides a gateway through the MSC 212 for the UE to access a circuit-switched network 216.
  • the GMSC 214 includes a home location register (HLR) (not shown) containing subscriber data, such as the data reflecting the details of the services to which a particular user has subscribed.
  • HLR home location register
  • the HLR is also associated with an authentication center (AuC) that contains subscriber-specific authentication data.
  • AuC authentication center
  • the core network 204 also supports packet-data services with a serving GPRS support node (SGSN) 218 and a gateway GPRS support node (GGSN) 220.
  • GPRS which stands for General Packet Radio Service, is designed to provide packet-data services at speeds higher than those available with standard GSM circuit-switched data services.
  • the GGSN 220 provides a connection for the RAN 202 to a packet- based network 222.
  • the packet-based network 222 may be the Internet, a private data network, or some other suitable packet-based network.
  • the primary function of the GGSN 220 is to provide the UEs 210 with packet-based network connectivity. Data packets are transferred between the GGSN 220 and the UEs 210 through the SGSN 218, which performs primarily the same functions in the packet-based domain as the MSC 212 performs in the circuit-switched domain.
  • the UMTS air interface is a spread spectrum Direct-Sequence Code Division
  • DS-CDMA Spread spectrum Multiple Access
  • the TD-SCDMA standard is based on such direct sequence spread spectrum technology and additionally calls for a time division duplexing (TDD), rather than a frequency division duplexing (FDD) as used in many FDD mode UMTS/W-CDMA systems.
  • TDD uses the same carrier frequency for both the uplink (UL) and downlink (DL) between a Node B 208 and a UE 210, but divides uplink and downlink transmissions into different time slots in the carrier.
  • Fig. 8 shows a frame structure 250 for a TD-SCDMA carrier, which may be used in communications between UE 12 and network entity 14 discussed herein.
  • the TD-SCDMA carrier as illustrated, has a frame 252 that may be 10 ms in length.
  • the frame 252 may have two 5 ms subframes 254, and each of the subframes 254 includes seven time slots, TSO through TS6.
  • the first time slot, TSO may be allocated for downlink communication, while the second time slot, TS 1 , is usually allocated for uplink communication.
  • the remaining time slots, TS2 through TS6, may be used for either uplink or downlink, which allows for greater flexibility during times of higher data transmission times in either the uplink or downlink directions.
  • a downlink pilot time slot (DwPTS) 256, a guard period (GP) 258, and an uplink pilot time slot (UpPTS) 260 are located between TSO and TS 1.
  • Each time slot, TS0-TS6, may allow data transmission multiplexed on a maximum of, for instance, 16 code channels.
  • Data transmission on a code channel includes two data portions 262 separated by a midamble 264 and followed by a guard period (GP) 268.
  • the midamble 264 may be used for features, such as channel estimation, while the GP 268 may be used to avoid inter-burst interference.
  • Fig. 9 is a block diagram of a Node B 310 in communication with a UE 350 in a RAN 300, where RAN 300 may be the same as or similar to RAN 202 in Fig. 7, the Node B 310 may be the same as or similar to Node B 208 in FIG. 7 or the network entity 14 in Fig. 1 including communication component 30, and the UE 350 may be the same as or similar to UE 210 in FIG. 7 or the UE 12 in Fig. 1 including communication component 22.
  • a transmit processor 320 may receive data from a data source 312 and control signals from a controller/processor 340. The transmit processor 320 provides various signal processing functions for the data and control signals, as well as reference signals (e.g., pilot signals).
  • the transmit processor 320 may provide cyclic redundancy check (CRC) codes for error detection, coding and interleaving to facilitate forward error correction (FEC), mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M-phase-shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM), and the like), spreading with orthogonal variable spreading factors (OVSF), and multiplying with scrambling codes to produce a series of symbols.
  • BPSK binary phase-shift keying
  • QPSK quadrature phase-shift keying
  • M-PSK M-phase-shift keying
  • M-QAM M-quadrature amplitude modulation
  • OVSF orthogonal variable spreading factors
  • channel estimates may be derived from a reference signal transmitted by the UE 350 or from feedback contained in the midamble 214 (Fig. 8) from the UE 350.
  • the symbols generated by the transmit processor 320 are provided to a transmit frame processor 330 to create a frame structure.
  • the transmit frame processor 330 creates this frame structure by multiplexing the symbols with a midamble 214 (Fig. 8) from the controller/processor 340, resulting in a series of frames.
  • the frames are then provided to a transmitter 332, which provides various signal conditioning functions including amplifying, filtering, and modulating the frames onto a carrier for downlink transmission over the wireless medium through smart antennas 334.
  • the smart antennas 334 may be implemented with beam steering bidirectional adaptive antenna arrays or other similar beam technologies.
  • a receiver 354 receives the downlink transmission through an antenna 352 and processes the transmission to recover the information modulated onto the carrier.
  • the information recovered by the receiver 354 is provided to a receive frame processor 360, which parses each frame, and provides the midamble 214 (Fig. 8) to a channel processor 394 and the data, control, and reference signals to a receive processor 370.
  • the receive processor 370 then performs the inverse of the processing performed by the transmit processor 320 in the Node B 310. More specifically, the receive processor 370 descrambles and despreads the symbols, and then determines the most likely signal constellation points transmitted by the Node B 310 based on the modulation scheme.
  • the soft decisions may be based on channel estimates computed by the channel processor 394.
  • the soft decisions are then decoded and deinterleaved to recover the data, control, and reference signals.
  • the CRC codes are then checked to determine whether the frames were successfully decoded.
  • the data carried by the successfully decoded frames will then be provided to a data sink 372, which represents applications running in the UE 350 and/or various user interfaces (e.g., display).
  • Control signals carried by successfully decoded frames will be provided to a controller/processor 390.
  • the controller/processor 390 may also use an acknowledgement (ACK) and/or negative acknowledgement (NACK) protocol to support retransmission requests for those frames.
  • ACK acknowledgement
  • NACK negative acknowledgement
  • a transmit processor 380 receives data from a data source 378 and control signals from the controller/processor 390 and provides various signal processing functions including CRC codes, coding and interleaving to facilitate FEC, mapping to signal constellations, spreading with OVSFs, and scrambling to produce a series of symbols.
  • Channel estimates may be used to select the appropriate coding, modulation, spreading, and/or scrambling schemes.
  • the symbols produced by the transmit processor 380 will be provided to a transmit frame processor 382 to create a frame structure.
  • the transmit frame processor 382 creates this frame structure by multiplexing the symbols with a midamble 214 (FIG. 2) from the controller/processor 390, resulting in a series of frames.
  • the frames are then provided to a transmitter 356, which provides various signal conditioning functions including amplification, filtering, and modulating the frames onto a carrier for uplink transmission over the wireless medium through the antenna 352.
  • the uplink transmission is processed at the Node B 310 in a manner similar to that described in connection with the receiver function at the UE 350.
  • a receiver 335 receives the uplink transmission through the antenna 334 and processes the transmission to recover the information modulated onto the carrier.
  • the information recovered by the receiver 335 is provided to a receive frame processor 336, which parses each frame, and provides the midamble 214 (FIG. 2) to the channel processor 344 and the data, control, and reference signals to a receive processor 338.
  • the receive processor 338 performs the inverse of the processing performed by the transmit processor 380 in the UE 350.
  • the data and control signals carried by the successfully decoded frames may then be provided to a data sink 339 and the controller/processor, respectively. If some of the frames were unsuccessfully decoded by the receive processor, the controller/processor 340 may also use an acknowledgement (ACK) and/or negative acknowledgement (NACK) protocol to support retransmission requests for those frames.
  • ACK acknowledgement
  • NACK
  • the controller/processors 340 and 390 may be used to direct the operation at the Node B 310 and the UE 350, respectively.
  • the controller/processors 340 and 390 may provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the computer readable media of memories 342 and 392 may store data and software for the Node B 310 and the UE 350, respectively.
  • a scheduler/processor 346 at the Node B 310 may be used to allocate resources to the UEs and schedule downlink and/or uplink transmissions for the UEs.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • CDMA2000 Evolution-Data Optimized
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 Ultra-Wideband
  • Bluetooth Bluetooth
  • the actual telecommunication standard, network architecture, and/or communication standard employed will depend on the specific application and the overall design constraints imposed on the system.
  • processors have been described in connection with various apparatuses and methods. These processors may be implemented using electronic hardware, computer software, or any combination thereof. Whether such processors are implemented as hardware or software will depend upon the particular application and overall design constraints imposed on the system.
  • a processor, any portion of a processor, or any combination of processors presented in this disclosure may be implemented with a microprocessor, microcontroller, digital signal processor (DSP), a field-programmable gate array (FPGA), a programmable logic device (PLD), a state machine, gated logic, discrete hardware circuits, and other suitable processing components configured to perform the various functions described throughout this disclosure.
  • DSP digital signal processor
  • FPGA field-programmable gate array
  • PLD programmable logic device
  • state machine gated logic, discrete hardware circuits, and other suitable processing components configured to perform the various functions described throughout this disclosure.
  • processors any portion of a processor, or any combination of processors presented in this disclosure may be implemented with software being executed by a microprocessor, microcontroller, DSP, or other suitable platform.
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • the software may reside on a computer-readable medium.
  • a computer- readable medium may include, by way of example, memory such as a magnetic storage device (e.g., hard disk, floppy disk, magnetic strip), an optical disk (e.g., compact disc (CD), digital versatile disc (DVD)), a smart card, a flash memory device (e.g., card, stick, key drive), random access memory (RAM), read only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), a register, or a removable disk.
  • memory is shown separate from the processors in the various aspects presented throughout this disclosure, the memory may be internal to the processors (e.g., cache or register).
  • Computer-readable media may be embodied in a computer-program product.
  • a computer-program product may include a computer-readable medium in packaging materials.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne des procédés et un appareil pour une communication sans fil au niveau d'un équipement utilisateur (UE), qui consistent à envoyer un message d'amélioration de liaison descendante à une entité de réseau lorsqu'une condition d'amélioration de liaison descendante a été détectée. En outre, les procédés et l'appareil consistent à recevoir une communication à partir de l'entité de réseau en réponse à l'envoi du message d'amélioration de liaison descendante. En outre, des procédés et un appareil pour une communication sans fil au niveau d'une entité de réseau consistent à détecter une condition d'amélioration de liaison descendante. En outre, les procédés et l'appareil consistent à transmettre un message d'amélioration de liaison descendante provenant d'une entité de réseau à un UE en réponse à la détection de la condition d'amélioration de liaison descendante.
PCT/US2014/059414 2013-10-11 2014-10-07 Procédés et appareil pour une communication de liaison descendante améliorée Ceased WO2015054191A1 (fr)

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